Induction of dormancy in Lobesia botrana by long day and high temperature conditions

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Published: Jan 8, 1988
DOI: https://doi.org/10.12681/eh.13953
Keywords:
Grape berry moth High tmperature effects Insect diapause Insect dorélimination mancy Lobesia botrana Photoperiod effects
Μ. Ε. Tzanakakis
Laboratory of Applied Zoology and Parasitology, University of Thessaloniki, 540 06 Thessaloniki, Greece
Μ. Savopoulou-Soultani
Laboratory of Applied Zoology and Parasitology, University of Thessaloniki, 540 06 Thessaloniki, Greece
C. S. Oustapassidis
Laboratory of Applied Zoology and Parasitology, University of Thessaloniki, 540 06 Thessaloniki, Greece
S.C. Verras
Laboratory of Applied Zoology and Parasitology, University of Thessaloniki, 540 06 Thessaloniki, Greece
Η. Hatziemmanouel
Laboratory of Applied Zoology and Parasitology, University of Thessaloniki, 540 06 Thessaloniki, Greece
Abstract
Lobesia botrana (Denis and Schiffermueller) (Lepidoptera: Tortricidae) is known to enter a facultative autumnohibernal diapause-mediated dormancy in the pupal stage, when the embryonic and early larval stages are exposed to short-day photo-periods. Yet, in a laboratory stock originating from northern Greece and reared for years on an artificial larval diet, dormancy occurred also under a long-day photo-period. When the eggs were incubated at 30oC in the dark or at 26 oC under the natural daylength of August in northern Greece, and the larvae grew at L:D 16:8 and 25-26 oC, but not 20 oC, a substantial percentage of the pupae entered dormancy. This dormancy seems to be diapause-mediated. It is not known whether it is a typical summer diapause.
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